What this breaker carries
The Siemens 3VA2440-7MS32-0KH0 is a 3-pole IEC frame 630 circuit breaker rated 400 A continuous with a breaking capacity class C — Icu of 110 kA at 415 V AC. That means it safely interrupts fault currents up to 110 kA without damage to itself or upstream gear, sized for high-fault plant distribution or large motor branch circuits. It ships with the ETU310M electronic trip unit configured for starter protection — short-circuit protection only (no overload function), with adjustable instantaneous pickup Ii from 3 to 15 x In. The 'M' designation means it's intended for motor starter coordination where the overload relay handles thermal protection.
Integrated accessories
Factory-fitted: a shunt trip on the left side (208–277 V AC, 50/60 Hz), two auxiliary switches, and one trip alarm switch. Also includes the nut keeper kit for secure mounting. The shunt trip allows remote tripping for emergency-stop or safety circuits; the alarm switch signals a trip event back to the PLC or annunciator.